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https://www.merriam-webster.com/dictionary/lumen-hour
Definition of lumen-hour. : a unit of luminous energy equal to a lumen of luminous flux acting for one hour.
https://www.dictionary.com/browse/lumen-hour
Lumen-hour definition, a unit of luminous energy, equal to that emitted in 1 hour by a light source emitting a luminous flux of 1 lumen. Abbreviation: lm-hr See more.
https://encyclopedia2.thefreedictionary.com/lumen-hour
lumen-hour. [ ′lü·mən ¦au̇r] (optics) A unit of quantity of light (luminous energy), equal to the quantity of light radiated or received for a period of 1 hour by a flux of 1 lumen. Abbreviated lm-hr. McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 …
https://www.merriam-webster.com/dictionary/lumen
The lumen is a measure of "luminous flux;" a standard 100-watt lightbulb gives off 1500–1700 lumens. Luminous flux indicates how much light is actually perceived by the human eye.
https://www.lumens.com/how-tos-and-advice/light-bulb-facts.html
The lumens definition is: “a unit of luminous flux in the International System of Units, that is equal to the amount of light given out through a solid angle by a source of one candela intensity radiating equally in all directions.” In short... Lumens equals brightness! And watts do not.
https://www.dictionary.com/browse/lumen
Lumen definition, the unit of luminous flux, equal to the luminous flux emitted in a unit solid angle by a point source of one candle intensity. Abbreviation: lm See more.
https://courses.lumenlearning.com/payrollacct/chapter/lo2-2/
LO2: Define wages/hours worked. Hours Worked Under the Fair Labor Standards Act (FLSA). Source. The federal overtime provisions are contained in the Fair Labor Standards Act (FLSA). Unless exempt, employees covered by the Act must receive overtime pay for hours worked over 40 in a workweek at a rate not less than time and one-half their regular rates of pay.
https://www.westinghouselighting.com/lighting-education/lumen-maintenance-l70-rating.aspx
Lumen Maintenance is a measurement used to evaluate the decrease in light output of a bulb that occurs over time. LED light bulb life is defined as when the light bulb produces 70% of the initial lumens (L70). This measurement lets you know how long you can depend on an LED to provide an acceptable level of intensity as the day you installed it.
https://www.ledsmagazine.com/manufacturing-services-testing/standards/article/16695700/understanding-the-difference-between-led-rated-life-and-lumenmaintenance-life-magazine
Oct 20, 2011 · Understanding the difference between LED rated life and lumen-maintenance life (MAGAZINE) Oct. 21, 2011 The rated life of an LED light source is different from the lumen-maintenance life, and is an essential reliability value that is required by luminaire makers and end users, as JIANZHONG JIAO explains.
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